Hand-held scanner with rotary position detector
First Claim
1. An optical scanner comprising a hand-holdable housing including:
- a scanner head for scanning a record medium;
a roller engageable with and rotatable by said record medium when scanned by said scanner head, said roller including an optically-sensible marking for use in measuring rotary movements of the roller;
a light source illuminating said roller and said marking thereof;
an optical sensor for sensing information on the record medium and the marking of the roller;
and a control system for periodically energizing said light source during predetermined time periods enabling said optical sensor to sense said marking of the roller during said predetermined time periods, and the information on the record medium during other time periods.
1 Assignment
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Accused Products
Abstract
An optical scanner including a hand-holdable housing including a scanner head for scanning a record medium, a roller engageable with and rotatable by the record medium when scanned by the scanner head, the roller including an optically-sensible marking for use in measuring rotary movements of the roller, a light source illuminating the roller and the marking thereof, an optical sensor for sensing information on the record medium and the marking of the roller, and a control system for periodically energizing the light source during predetermined time periods enabling the optical sensor to sense the marking of the roller during the predetermined time periods, and the information on the record medium during other time periods.
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Citations
26 Claims
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1. An optical scanner comprising a hand-holdable housing including:
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a scanner head for scanning a record medium; a roller engageable with and rotatable by said record medium when scanned by said scanner head, said roller including an optically-sensible marking for use in measuring rotary movements of the roller; a light source illuminating said roller and said marking thereof; an optical sensor for sensing information on the record medium and the marking of the roller; and a control system for periodically energizing said light source during predetermined time periods enabling said optical sensor to sense said marking of the roller during said predetermined time periods, and the information on the record medium during other time periods. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A hand-holdable optical scanner, comprising:
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a scanner head for scanning a record medium to read information therefrom; a roller engageable with and rotatable by said record medium when scanned by said scanner head, said roller including an optically-sensible marking indicating the rotary movements of the roller and thereby the displacement of said scanner head; a light source for illuminating said roller; an optical sensor for sensing light reflected from said record medium and light reflected from said roller; a first optical system having a focussing lens for focussing onto said optical sensor light reflected from said record medium; and a second optical system including said focussing lens of the first optical system for focussing onto said optical sensor light reflected from said roller. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A detector for detecting rotary movements of a rotary member about a rotary axis, comprising:
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a linear array of optical sensor elements extending parallel to said rotary axis of the rotary member; a light source for illuminating the outer surface of said rotary member; and an optically-sensible marking including at least one line extending helically on the outer face of said rotary member. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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Specification